21. From 2003 through 2009, the sales per share S (in dollars) for Columbia Sportswear can be modeled by S = -0.13556r + 1.8682r2 4.351t + 23.52, 3 sts 9 where t represents the year, with 1 = 3 corresponding to 2003. (Source: Columbia Sportswear Company) (a) Find the rate of change of the sales per share with respect to the year. (b) At what rate were the sales per share changing in 2004? in 2007? in 2008?
21. From 2003 through 2009, the sales per share S (in dollars) for Columbia Sportswear can be modeled by S = -0.13556r + 1.8682r2 4.351t + 23.52, 3 sts 9 where t represents the year, with 1 = 3 corresponding to 2003. (Source: Columbia Sportswear Company) (a) Find the rate of change of the sales per share with respect to the year. (b) At what rate were the sales per share changing in 2004? in 2007? in 2008?
Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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Question
Can u answer 21a and 21b please
Transcribed Image Text:(c) Compare the results of parts (a) and (b).
In Exercises 19 and 20, find an equation of the tangent line to the graph of f
at the given point. Then use a graphing utility to graph the function and the
equation of the tangent line in the same viewing window.
19. f(x) = 5x + 6x – 1; (-1, –2)
20. f(x) = (x + )(4x – 3); (1, 2)
21. From 2003 through 2009, the sales per share S (in dollars) for Columbia
Sportswear can be modeled by
S=-0.135561 + 1.8682/- – 4.351r + 23.52, 3 s rs 9
where t represents the
year,
with r = 3 corresponding to 20003. (Sourcer Columbia
Sportswear Company)
(a) Find the rate of change of the sales per share with respect to the
year.
(b) At what rate were the sales per share changing in 2004? in 2007? in 2008?
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